Vermont’s First Diverging Diamond Interchange
The Vermont Agency of Transportation (VTrans) is improving the roadway along the U.S. Routes 2/7 (U.S. 2/7) corridor, in the vicinity of Interstate 89 (I-89) Exit 16, to enhance mobility and safety in Colchester, Vermont. The project area extends from the Colchester-Winooski town line north for approximately 1 mile to just beyond the intersection of Sunderland Woods Road at U.S. 2/7. The core of the project is to reconfigure the existing tight diamond interchange to a Diverging Diamond Interchange at I-89 Exit 16.
Project Updates
Weekly Construction Update - Friday, April 3, 2026
TRAFFIC IMPACT AND DURATION: From Monday, April 6, through Friday, April 10, between 6 AM and 3 PM, the following traffic impacts will be in effect:
- single lane closure along the west side of U.S. Route 2/7 (U.S. 2/7) from Whitcomb Street to Mountain View Drive,
- intermittent single lane closure along the east side of U.S. 2/7 from South Park Drive and the Interstate 89 (I-89) southbound on-ramp,
- intermittent lane width reductions and potential intermittent lane closures along the I-89 northbound off-ramp and the I-89 southbound off-ramp,
- an instance of a single lane closure with traffic shifts on Mountain View Drive near the interstate.
Motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan ahead, consider alternative routes, or use other forms of transportation (carpooling, ridesharing, transit, biking, or walking). Drivers should slow down, use caution, and follow flaggers and signage.
CONSTRUCTION ACTIVITIES: Next week, crews will continue working along the west side of U.S. 2/7 between Whitcomb Street and Mountain View Drive installing light pole bases, widening the roadway and constructing the slip lanes for the I-89 southbound off-ramp and the I-89 northbound on-ramp. Crews will be installing overhead sign foundations and light pole bases along U.S. 2/7 between South Park Drive and the I-89 southbound on-ramp, the I-89 southbound off-ramp and I-89 northbound off-ramp, and Mountain View Drive near the interstate.
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JOIN US
The Exit 16 DDI will be joining the Burlington-Winooski Bridge Project at their Public Information Open House.
Wednesday, April 29, 2026
5 PM to 7 PM
Winooski School District
60 Normand Street
Weekly Construction Update - Friday, March 27, 2026
DATE: Friday, March 27, 2026
TRAFFIC IMPACT AND DURATION: From Monday, March 30, through Friday, April 3, between 6 AM and 3 PM, the following traffic impacts will be in effect:
- single lane closure along the west side of U.S. Route 2/7 (U.S. 2/7) from Whitcomb Street to Mountain View Drive,
- intermittent single lane closure along the east side of U.S. 2/7 from South Park Drive and the Interstate 89 (I-89) southbound on-ramp,
- intermittent lane width reductions and potential intermittent lane closures along the I-89 northbound off-ramp.
Motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan ahead, consider alternative routes, or use other forms of transportation (carpooling, ridesharing, transit, biking, or walking). Drivers should slow down, use caution, and follow flaggers and signage.
CONSTRUCTION ACTIVITIES:Next week, crews will be working along the west side of U.S. 2/7 between Whitcomb Street and Mountain View Drive widening the roadway and constructing the slip lanes for the I-89 southbound off-ramp and the I-89 northbound on-ramp. Crews will be installing overhead sign foundations along U.S. 2/7 between South Park Drive and the I-89 southbound on-ramp and along the I-89 northbound off-ramp.
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Weekly Construction Update - Friday, March 20, 2026
DATE: Friday, March 20, 2026
TRAFFIC IMPACT AND DURATION: From Monday, March 23, through Friday, March 27, between 6 AM and 3 PM, lane closures and lane shifts will be in place at the following locations:
- on the west side of U.S. Route 2/7 (U.S. 2/7) from the Highpoint Center intersection north to the Park & Ride intersection, and,
- on the east side of U.S. 2/7 from the Winooski town line near Checkerbay Carwash north to the Interstate 89 (I-89) Exit 16 southbound on-ramp.
Barriers are in place along the I‑89 Exit 16 northbound off‑ramp and on U.S. 2/7 in front of The Lighthouse Restaurant, and the roadway shoulder in this area is closed.
Independent utility companies will periodically conduct work along U.S. 2/7 between the Winooski town line and Sunderland Woods Road, under lane closures.
Motorists should expect significant delays when traveling through the work zone and along adjacent roadways. Please plan ahead, consider alternative routes, or use other forms of transportation (carpooling, ridesharing, transit, biking, or walking). Drivers should slow down, use caution, and follow flaggers and signage.
CONSTRUCTION ACTIVITIES: Next week, crews will install streetlight pole bases, remove curb, and continue preparing for upcoming roadway excavation (box cut). The contractor will also investigate and remove ledge as needed. Mast‑arm foundation work will take place at the U.S. 2/7 intersections with Highpoint Center and Mountain View Drive. Curb removal will occur between Highpoint Center and the I‑89 Exit 16 southbound off‑ramp and near the Park & Ride. Crews will also explore for ledge near Whitcomb Street and between the Winooski town line and the I‑89 Exit 16 southbound on‑ramp. Light‑pole base installation will take place on both sides of U.S. 2/7 in these areas. Work will also continue behind barriers along the I‑89 Exit 16 northbound off‑ramp near the Lighthouse Restaurant to build the roadway subbase.
Independent utility work will continue periodically along U.S. 2/7 between the Winooski town line and Sunderland Woods Road.
Read moreDriving Animations
Experience Exit 16 DDI
